Class 11th UNIT-3 MULTIMEDIA DESIGN – GIMP

 

Multimedia

1.   The term multimedia is a combination of two terms multi (meaning more than one) and media (meaning a mode of transmitting information).

2.    It may include the following forms of media:

●       Text

●       Graphics and Images

●       Audio

●       Video

●       Animation

GIMP:-

1.GIMP is an acronym for GNU Image Manipulation Program.

2.GIMP is multimedia software having a variety of powerful tools for image editing and manipulation.

3.It is an open source software suite to create, edit, enhance and manipulate images.

features of GIMP

1.    Software suite of painting and drawing tools with various brushes, a   

pencil, an airbrush, cloning, etc.

2.    Paint tools supporting high-quality anti-aliasing.

3.    Multiple Layers and channels for image manipulations.

4.    Transformation tools including rotate, scale, shear and flip.

GIMP TOOL BOX:-

The tools are organized into following main categories in GIMP.

a. Selection Tools 
b. Paint Tools 
c. Transform Tools 
d. Color Tools 
e. Others

Selection Tool:-

Selection tools support the functionality of selecting

 portions/regions from the current layer of an image,

 for manipulation. Once a selection is made, anything the user does

 will apply only to the area that the selection covers. 

Diffrence between straight line and free drawing:-

Intelligent Scissors 

Intelligent Scissors selects a part of an image automatically by

 high contrast or differences in colors, with constant-valued color

 contours.  The region to be selected is surrounded by boundary

 created by joining the nodes or anchor points clicked by mouse 

at the edges.

Foreground Select 

It works on selection by extracting foreground from the current

 image. This tool works better when the foreground and

 background are highly contrasting in color saturation. It is

 basically a combination of two different tools: 

1. Lasso tool: used to select a foreground area (similar to the Free Select tool).

2. Paintbrush tool: used to paint over selection to indicate the foreground color.

Fuzzy Select 

Fuzzy Select is a color based tool. Fuzzy selection (also called

 ‘magic wand’) is used for selecting areas in an image with the

 similar color component  The functionality of this tool is based

 on examining the RGB color components of the pixels that it

 clicks on. It is very important to pick the starting point correctly.

 

By Color Select

The selection by color also considers all the pixels with similar color component, but regardless of where they are located in the image. The similar pixels automatically get selected, even if they are trapped by other colors, unlike fuzzy tool.

Key Modifiers

The Key Modifiers associated with Paint tools are:

    1. Ctrl : The ctrl key has a special effect on every brush tool. It acts as “color picker” mode and sets the foreground to the active layer’s color for the Pencil, Paintbrush, Airbrush, Ink Tool, and Eraser tools.

    2. Shift : Shift key renders an effect of placing the tool into straight line mode especially with brush tools. First the starting point is chosen and clicked, and then Shift key is pressed continuously to create line segments.

    3. Ctrl + shift : It renders the tool into constrained straight line mode to create perfect horizontal, vertical or diagonal lines over the image objects. It can be used to constrain the angle between two successive lines.

Smudge Tool

Smudge tool , is used for smearing color pixels on a selected layer. Smudging is used to soften color transitions, make the image blurry, hide objects, and to create textures.

 

Clone Tool

Clone tool is used for copying the pixels from selected portions of an image to a destination area, the user wants to cover, or for reproducing the selected portions of an image. It uses the current brush to copy from a source image.

 

Transform Tools:

Transform tools tend to modify the presentation of an image or a particular element in an image. There are 9 such tools each having a variety of features and tool options.

 

 

MoveTool:

Move : It allows the image to be transformed or moved.

Tool Toggle : It allows switching from one option to another.

 

Crop

Current layer only : It is utilized only for the current layer.

Expand from center : It makes the picked portion bigger.

Fixed : It may alter the predefined shape of the rectangle.

Position : It acts as the placement of the selection.

Size : It lists the length/size of the selection.

Highlight : It highlights the marked selection, by darkening everything that lies in the background of the image.

 

Change the perspective/View of an image

The Perspective of an image can be modified to either forward or backward direction. By default, the direction is set to be the forward direction.

 

The Cage Transformation Tool

It allows selecting an area of an image, just like a Free Select Lasso tool with the  help of anchor points. The anchor points create a cage-like structure around the image and when it is closed, one can use it to transform/deform an image by dragging the points in the desired shape of deformation.